package com.DreamForce.Demo.common.tools;
/**
 * generate the MD5 for ID field.
 * using :  MD5Generate.getMD5("Str".getBytes())
 * @author darcyyang
 *
 */
public class MD5Generate {

	 public static String getMD5(byte[] source) {
		  String s = null;
		   char hexDigits[] = {       
	    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',  'e', 'f'};
		try
		   {java.security.MessageDigest md = java.security.MessageDigest.getInstance( "MD5" );
		    md.update( source );
		    byte tmp[] = md.digest();                                                    
		    char str[] = new char[16 * 2];   
		    int k = 0;                                
		    for (int i = 0; i < 16; i++) {                                                  
		    byte byte0 = tmp[i];               
		    str[k++] = hexDigits[byte0 >>> 4 & 0xf];                                                          
		    str[k++] = hexDigits[byte0 & 0xf];            
		    }
		   s = new String(str);                                 
		   }catch( Exception e )
		   {e.printStackTrace();}
		   return s;
		 }
}
